Glass-handling apparatus.



J. E. MILLI REN. GLASS HANDLING APPARATUS.

APPLICATION FILED JAN.22. 1912. 1 3 177 Patented Sept. 10, 1912.

2 SHEETS-SHEET 1.

WITNESSES J. E. MILLIREN.

GLASS HANDLING APPARATUS.

APPLIOATION FILED JAN.22.1912.

1 ,988,177 Patented Sept. 10, 1912.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR a A! v UNITED STATES. PATENT. OFFICE.

worm nmntmim, or FALLS annex, :Pnmrsnivanu.

enass-nannnme Arra'na'rus, f

Specification of Letters Patent. Patented Sept. 10, 1912. Application filed January 22, 1912. "serial No. 872,778.

To all ivhom it min concern.

Be it known that I, Jon E. MILIJREN, a citizen of the United States of America, re-

siding at Falls Creek, in the county of J efferson and State of Pennsyl ania, have invented new and useful Improvements in Glass-Handling Apparatus, of which the following is a full, clear, and exact descrip tion, reference being had to the accompanying drawings, which'form part of this specification. 7

My invention, subject of this application, relates to the drawingof cylinders from molten glass which cylinders are. subse- 15 -quently -split and flattened in the manufacture of sheet glass.

It has particular reference to the bait used in the drawing of the cylinder, and as such a device I provide a bait which will firmly support the cylinders under the operative strains which tend to set up fractures and working loose of the glass cylinder and fall ing awa thereof from the bait as it'is lifted. In the di'awing of the cylinders the heating of the bait by absorption renders quick and perfect formation of the neck of the cylinders impossible by reason of the tendency of the glass to flow from and not set to the operative faceof the bait. By'my invention I aim to provide a removable operative face for thebait and thereby overcome such difficulty of non-setting or non-adherence,

which, as well as other details of construction with attending advantages, will be hereinafter more fully described.

I will now describe my invention, referring to the drawings, so that others skilled in the art may understand and construct the same, it being premised, however, that many changes may be made in the construction shown without departing from my invention.

'Figure l is a vertical sectional View of a bait embodying myinvention, the same being positioned above a batch of molten glass from which the cylinder is adapted to be drawn; Fig. 2 is a similar view showing the bait lowered into the batch of glass preparatory to the drawing of the cylinder by elevation of the bait; Fig. is a similar view showing the bait lifted and the initial for-' mation of the cylinder, that is, the neck or top of the cylinder; Fig. 4 is an enlarged lunizoutal section on the line ll of Fig: 1: 1 mg. a 15 an (levational view showing the i into the recesses 11, to readlly setand there- 1 10 cylinder and the operative lower portion of the bait attached t ereto, the upper part of the bait being separated from the said lower part; and Fig. 6 is a fragmentary vertical section, showing modified sha e of the vertigal ribs formed on the interior face of the ait.

- The bait 2 is attached, preferably, by

screw=threads-, tothe'usual pipe or tube 3 or other suitable mounting by means of which the drawing med1um, such as air, may be deliveredto the cylinder, the bait having the connecting air-passage 4. -C0mprising the bait-proper '2, is therlower rin member 5 andupper inverted. cup-s aped or' dome member 6, having screw threaded connection at 7, with one another. This connection 7 is such that the sections 5 and 6 may be brought by the screw-threads-to a perfect seal to prevent escapeof the drawing 'alr when the cylinder is being drawn. The section 5, as Wlll be seen, is somewhat flared or wider at the top than the bottom, the wall 5 8 taking the shape of a reverse curve, Such-- 'fiaring form of construction enables tli'e neck of'the formed cylinder to be easily and. readily ejected from the top thereof in the cleaning of the bait for another drawing operation. With the reverse curve again giving a flaring "effect to the lower edge of t to set'upfractures, are obviated-{the glass wall of the cylinder not. drawing across the lower edge of the bait but, instead, taking der is primarily supported for the drawing 100 operation by the gripping efiect roduced by the curved formation of the wal 8.

In drawing the glass cylinder, the bait is lowered, as shown. in Fig. 2, into the glass a depth suflicient to cause the glass to rise 105 within the chamber 12 to a height preferably two-thirds the length of the ribs 10. The cool condition or low temperature of the ring 5 causes the glass, which has flowed like e bait, as zit-9, sharp corners, 'with theirten'dency lengths,

the edges thereof present no such 'aswould tend to set up line fractures in the" by firmly support the neck 13 and depend-1 ing wall 14 as the bait rises tocomplete the drawing operation. After thecylinder is completely "drawn it may be detached .from

I the drawing apparatus or tube,'solas to'permit of its being lowered and cut into proper from the top shown in Fig. 5, the drawn cylinderbeing in'dieatedby the to repeat the drawing operation anothe'r'ring applied-to the head or top member 5 may be 6 and the formation of the cylinder neck and drawing proceeded with. 1

A particular'advantage of this separable ,constructionof the drawing apparatusis that ring members 6 of desirable low temperature may alwaysbe' used, thereby greatly expediting the production of cylinder's. It also-enables the detachment of the cylinder from the drawing apparatus for subsequent manipulation without liability othrakage, resulting in large. saving of shown in Fig. 4: wherein. the edges, are rounded. The shape-of the. ribs may be greatly varied as desired without departing from my invention; A modified shape is shown in vFig. 6, the ends of the ribs curving outwardly at 15 into the tapered ends of the recesses. 16. .It would alsobe-no departure from my-invention to form the ribs without recessing the surface as shown.

I Copies of this patent may be 'objtainedfoi' five cents each; by addressing the by separating 'the 5 lower portion" 5 section 6 by unscrewllighasis,

numeral 11. If it is desired,

appreciated by those skilled in the art.

Havingdescribed any invention, what I claim ia'nd de' sire to secure by :Letters{ Patent "body portion having a dependent annular Jvall, the interior of which is provided with substantially upright and alternately disposed grooves and projections. i

body portion having a depending'annular wall the interior of which is provided. with 3. A glass drawing bait :com'prlsing a body portion. having adepending annular ;wall the interior ofwhich isprovlded with substantially vertically. disposed ribs ar-' ranged to converge toward-one another at thedaottom; I

-4. A glassi drawing baitcomprising. a -body portion having-a depending annular wall the interior of which is provided with substantially vertically disposed ribs having a varying cross sectional shape-from end to end a '5. A glass drawing baitcomprising a wall the interior of which convergesdownwardly; and which carries a series 'of substantially vertically disposed ribs.

In testimony whereof, I-have hereunto set my hand.-='

- 4 JOHN E. MILLIR'EN.

Witnesses:

MARY A. .BARTH, M. A. KELLER.

dommisidner of Patents,

Washington, D. C.

body portion having a depending annular" Other advantages of my invention will be A" glas s drawing; bait comprising a I 2. A glass drawing bait comprising a H substantially vertically disposed projections. 

